10237300 GM Block Chevy Gmc

Review GM Chevy 502 4bolt Block Mk6 4.470 Bore-may Stay Chevy/gmc for CHEVY GMC

The GM 10237300 Chevy 502 4-bolt block, also known as the Mark VI J-11-7 4.470 bore block, is a high-performance engine component designed for use in Chevrolet and GMC applications. This block is specifically engineered for use with the Mark VI 4-bolt main bearing caps and is suitable for bore sizes of 4.470 inches.

This Chevy 502 4-bolt block is a cast iron piece, ensuring strength and durability for high-horsepower applications. The bore surfaces are prepared with a flat, precision-machined finish, allowing for easy and accurate cylinder bore honing. The block deck is also machined flat, ensuring a proper gasket seal and optimal engine compression.

The block features a wet sump oiling system, allowing for the oil pump to be located at the front of the engine, improving oil capacity and cooling. The block also includes a freeze plug kit, making it easy to drain the coolant system during winterization.

The 4-bolt main bearing caps provide increased engine rigidity and stability, reducing vibration and improving power delivery. The block is also designed to work with a variety of crankshafts and connecting rods, providing flexibility for custom engine builds.

This Chevy 502 4-bolt block is a must-have for serious engine builders and performance enthusiasts looking to create a high-performance Chevrolet or GMC engine. Its strong, durable design, combined with its precision machining and flexibility for customization, make it an ideal choice for high-horsepower applications. Whether you're building a hot rod, restoring a classic, or simply looking to upgrade your daily driver, the GM 10237300 Chevy 502 4-bolt block is an essential component for your project.

Pros and Cons of Buying a GM 10237300 Chevy 502 4-bolt Block (4.470 bore) for a Performance Build

The GM 10237300 Chevy 502 4-bolt block is a popular choice for high-performance engine builds due to its durability and potential power output. However, like any engine component, it comes with its advantages and disadvantages. In this article, we will discuss the pros and cons of purchasing this block for your performance build.

1. Robust Design: The Chevy 502 block is known for its strong design and high-performance capabilities. It features a 4-bolt main bearing configuration, which provides better main bearing support and increased durability.

2. Versatility: This block can accommodate various stroker kits and bore sizes, making it a versatile choice for different performance applications. The 4.470-inch bore version offers a good balance between power and drivability.

3. Availability: The Chevy 502 block is widely available from various aftermarket suppliers, ensuring ease of acquisition for builders.

4. Compatibility: This block is compatible with many popular engine components, such as heads, crankshafts, and connecting rods, which simplifies the engine build process.

1. Cost: The Chevy 502 block is generally more expensive than other blocks due to its high-performance capabilities and robust design. This may be a significant investment for some builders.

2. Weight: The Chevy 502 block is heavier than standard blocks, adding more weight to the engine and potentially affecting its overall performance and fuel economy.

3. Complexity: Building a high-performance engine using this block requires a good understanding of engine building principles and advanced techniques. This may be a challenge for some builders.

The GM 10237300 Chevy 502 4-bolt block (4.470 bore) offers significant advantages for those seeking high-performance capabilities in their engine build. Its robust design, versatility, and availability make it an attractive choice for performance enthusiasts. However, its cost, weight, and complexity may be drawbacks for some builders. Ultimately, the decision to purchase this block depends on your specific performance goals, budget, and expertise.

If you're looking for a high-performance engine block that can deliver significant power gains, the Chevy 502 block is a solid choice. However, it's essential to consider the associated costs, weight, and complexity before making a purchase. Ensure that you have a clear understanding of your performance goals, budget, and expertise before embarking on your engine build project using this block.

Details:

Very nice condition, guaranteed. Note: block has 1 sleeve in #7 roughed at 4.593. Siamese bores, 1 PC seal, 4.470 bore-may stay, cleaned nagged. This block can be finished at 4.600 or sleeve it back to standard.

Gm 10237300 mk6 8.2 502 4 bolt bare block dated J-11-7.

specifications engineblocksam:

• for makes: Chevy, Gmc
• brand: Gm
• mpn: 10237300
• type: Engine Block
• material: Cast Iron
• vintage part: Yes
• country of origin: United States

offer engineblocksam:

• in stock #: 1
• price: $1499.99
• item condition: For parts or not working
• sold #: 11
• availability: in stock
• options: ship-to-home
• started: january 13, 2026

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• category: Auto Parts > Car Truck Accessories > Engines > Blocks

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